我遇到了openxava + maven + tomcat7集成的问题。 Openxava的库已集成到MAVEN proyect中。我从ECLIPSE运行该应用程序，并抛出以下执行语句：
Grave: El Servlet.service() for servlet jsp throws a Exception
java.lang.NoSuchMethodError: javax.persistence.EntityManager.getMetamodel()Ljavax/persistence/metamodel/Metamodel;
at org.openxava.annotations.parse.AnnotatedClassParser.obtainManagedClassNamesUsingJPA(AnnotatedClassParser.java:2558)
at org.openxava.annotations.parse.AnnotatedClassParser.getManagedClassNames(AnnotatedClassParser.java:2473)
at org.openxava.annotations.parse.AnnotatedClassParser.getClassNameFor(AnnotatedClassParser.java:2425)
at org.openxava.annotations.parse.AnnotatedClassParser.parse(AnnotatedClassParser.java:67)
at org.openxava.component.ComponentParser.parseAnnotatedClass(ComponentParser.java:47)
at org.openxava.component.ComponentParser.parse(ComponentParser.java:36)
at org.openxava.component.MetaComponent.get(MetaComponent.java:58)
at org.openxava.component.MetaComponent.exists(MetaComponent.java:70)
at org.openxava.application.meta.MetaApplication.existsModel(MetaApplication.java:151)
at org.openxava.application.meta.MetaApplication.getMetaModule(MetaApplication.java:140)
at org.openxava.controller.ModuleManager.getMetaModule(ModuleManager.java:1115)
at org.openxava.controller.ModuleManager.setupModuleControllers(ModuleManager.java:273)
at org.openxava.controller.ModuleManager.setModuleName(ModuleManager.java:1088)
at org.apache.jsp.xava.module_jsp._jspService(module_jsp.java:174)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at org.openxava.web.servlets.ModuleServlet.doGet(ModuleServlet.java:24)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:409)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1044)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
该应用程序与MySQL数据库连接。我已经在TOMCAT 7上部署了相同的应用程序，但是这一次它是使用ANT（暂无）和WORKS !!构建的。为什么不这样做？ OPENXAVA + MAVEN集成的说明位于以下站点：http://code.google.com/p/openxava-maven/wiki/SampleOXMavenProject。
谢谢
最佳答案
您在这里有问题的答案：
https://sourceforge.net/p/openxava/discussion/437013/thread/c6fa8d07/